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Green Power Station

The Green Power Station®

A Green Power Station is a grid-connected energy hub built around large-scale energy storage and grid-forming power conversion. It does what conventional power stations have always done for the grid – stabilize voltage and frequency, provide reserves and restart the system after a blackout – but with renewable energy and without fuel.

Five building blocks

  • High-voltage substation connecting to the transmission grid, typically at 132–150 kV.
  • Grid-forming Power Conversion System (PCS) – bidirectional converters and controls that set voltage and frequency and support the grid in milliseconds.
  • Energy storage of at least four hours, based on LFP battery technology in liquid-cooled containers.
  • Direct lines to renewable producers and large consumers within the Energy Hub.
  • 24/7 control from the WeStorix Energy Management & Trading Center.

One connection point. Many producers and consumers. One optimized system.

Green Power Station architecture

Green Power Station architecture The public transmission grid connects by high-voltage cable, through the grid connection point and meter, to the Green Power Station. Inside the station a high-voltage substation with transformers feeds a medium-voltage busbar. The BESS is an integrated system on that busbar: a grid-forming Power Conversion System on the AC side, energy storage of at least four hours based on LFP battery technology on the DC side, auxiliary and supporting systems, and control, protection and electrical systems. Station control links the station to the Energy Management and Trading Center, which handles dispatch, optimization, trading and settlement with markets and the system operator. Direct lines start at the busbar inside the station and run to the Energy Hub participants: renewable generation, industry and Power-to-X, data centers, and transport and maritime users. Public grid and markets Green Power Station® Energy Hub participants · direct lines Medium-voltage busbar · e.g. 33 kV / 10 kV M HV cable connection point & meter BESS - integrated system AC DC Markets & system operator Public transmission grid TSO substation, 132–150 kV EMTC 24/7 dispatch, optimization, trading, settlement HV substation & transformers Station control Plant controller · EMS SCADA · metering Grid-forming PCS Converters + control Auxiliary & supporting systems Energy storage ≥ 4 h LFP battery technology Control, protection & electrical systems BMS, relays, switchgear Renewable generation Solar · wind Industry & Power-to-X Process heat · gases · PtX Data centers Firm, UPS-class supply Transport & maritime Trucks · ferries · shore power 1 2 3 4 5 6 7 8 High voltage, busbar and DC link AC power and direct lines from the station busbar Control and data
  1. Public transmission grid: TSO substation, 132–150 kV
  2. HV substation and transformers
  3. Medium-voltage busbar, for example 33 kV / 10 kV
  4. Grid-forming PCS: converters and control
  5. Energy storage of at least four hours, based on LFP battery technology
  6. Station control: plant controller, EMS, SCADA and metering
  7. EMTC: 24/7 dispatch, optimization, trading and settlement
  8. Energy Hub participants, connected by direct line
Text description of this illustration

The public transmission grid connects by high-voltage cable, through the grid connection point and meter, to the Green Power Station. Inside the station a high-voltage substation with transformers feeds a medium-voltage busbar. The BESS is an integrated system on that busbar: a grid-forming Power Conversion System on the AC side, energy storage of at least four hours based on LFP battery technology on the DC side, auxiliary and supporting systems, and control, protection and electrical systems. Station control links the station to the Energy Management and Trading Center. Direct lines start at the busbar inside the station and run to the Energy Hub participants: renewable generation, industry and Power-to-X, data centers, and transport and maritime users.

Energy Hub

The Energy Hub

Around each Green Power Station, WeStorix builds an Energy Hub: renewable producers and large electricity users connected by direct line behind one grid connection point.

Energy flows are managed in real time from local generation, consumption, the state of charge of the energy storage and grid conditions. Generation and demand behind the meter offset each other before anything is exchanged with the public grid.

What the hub delivers

  • Renewable output absorbed and shifted instead of curtailed.
  • Capacity for consumers who cannot get a connection any other way.
  • Firm, storage-backed supply and better power quality.
  • Less pressure on transmission and distribution networks.
How the Energy Hub works: energy flows Renewables send surplus power by direct line to the Green Power Station, which provides storage, conversion and control. The station gives consumers firm green supply and backup. It imports from and exports to the public grid within the connection limit and provides grid services. Three typical situations: at midday surplus, solar and wind exceed local demand, the energy storage charges and export stays within limits; at the evening peak, the energy storage discharges to consumers and the market and grid import is reduced; during a grid event, the grid-forming PCS holds voltage and frequency and critical loads ride through. Energy flows in the hub Renewables Solar and wind connected by direct line Public grid Green Power Station Storage · conversion · control Consumers Industry, data centers and transport surplus absorbed firm green supply & backup import / export within the connection limit + grid services Three typical situations Midday surplus Solar and wind exceed local demand → the energy storage charges; export stays within limits. Evening peak The energy storage discharges to consumers and the market; grid import is reduced. Grid event The grid-forming PCS holds voltage and frequency; critical loads ride through. Exchange with the public grid Supply to consumers Renewable generation
Text description of this illustration

Renewables send surplus power by direct line to the Green Power Station, which provides storage, conversion and control. The station gives consumers firm green supply and backup. It imports from and exports to the public grid within the connection limit and provides grid services. At midday surplus, solar and wind exceed local demand, the energy storage charges and export stays within limits. At the evening peak, the energy storage discharges to consumers and the market and grid import is reduced. During a grid event, the grid-forming PCS holds voltage and frequency and critical loads ride through.

Direct lines

Direct lines relieve the grid

Instead of every producer and consumer waiting for its own grid connection, they connect by direct line to the Green Power Station and share its connection point.

WeStorix acts as a single counterparty toward the system operator. Behind the WeStorix meter, each participant has its own protection, metering and delivery point, and pays only for the services it uses.

Fewer connection requests. Better use of existing grid capacity. Faster access for new projects.

Direct lines: one connection point instead of many Two diagrams side by side. Conventional: solar, wind, industry, a data center and charging each connect separately to the public grid - five separate connection requests, each in the queue. With a WeStorix Energy Hub: the same five participants connect by direct lines that start at the busbar inside the Green Power Station, which has one connection to the public grid. ConventionalEach project connects separately With a WeStorix Energy Hub Participants share one connection Public grid Public grid Solar Wind Industry Data center Charging 5 separate connection requests, each in the queue 1 connection Green Power Station Solar Wind Industry Data center Charging Busbar Direct lines from inside the station to each participant
Text description of this illustration

Two diagrams side by side. Conventional: solar, wind, industry, a data center and charging each connect separately to the public grid – five separate connection requests, each in the queue. With a WeStorix Energy Hub: the same five participants connect by direct lines that start at the busbar inside the Green Power Station, which has one connection to the public grid.

Grid forming

Grid-forming power conversion

Most power converters follow the grid: they need an existing, stable voltage and frequency to operate. A grid-forming Power Conversion System (PCS) creates that reference itself through its bidirectional converters and control system – behaving like the rotating generators of conventional power plants, but faster and without fuel.

As fossil plants retire, the power system loses the inertia, short-circuit strength and voltage support it depends on. Grid-forming PCS, backed by large-scale energy storage, puts these properties back – exactly where renewable generation and new demand connect.

The grid-forming function sits in the PCS and its controls. The energy storage, based on LFP battery technology, supplies the energy behind it.

Why grid-forming power conversion matters The grid-forming Power Conversion System provides six capabilities: synthetic inertia, which resists sudden frequency changes; fast frequency response, which reacts within milliseconds; voltage and reactive power, which keeps voltage within limits; short-circuit contribution, which lets protection systems work; black start, which restarts the grid after a blackout; and controlled islanding, which keeps critical loads running. By comparison, a grid-following PCS needs a strong grid and trips or limits output when the grid is weak, while a grid-forming PCS sets voltage and frequency and strengthens a weak grid. What the grid-forming PCS provides Grid-forming PCS Bidirectional converters and control that set voltage and frequency Synthetic inertia Resists sudden frequency changes Fast frequency response Reacts within milliseconds Voltage & reactive power Keeps voltage within limits Short-circuit contribution Lets protection systems work Black start Restarts the grid after a blackout Controlled islanding Keeps critical loads running Grid-following and grid-forming compared Grid-following PCS Needs a strong grid; trips or limits output when the grid is weak Grid-forming PCS Sets voltage and frequency; strengthens a weak grid
Text description of this illustration

The grid-forming Power Conversion System provides six capabilities: synthetic inertia, which resists sudden frequency changes; fast frequency response, which reacts within milliseconds; voltage and reactive power, which keeps voltage within limits; short-circuit contribution, which lets protection systems work; black start, which restarts the grid after a blackout; and controlled islanding, which keeps critical loads running. A grid-following PCS needs a strong grid and trips or limits output when the grid is weak; a grid-forming PCS sets voltage and frequency and strengthens a weak grid.

Modular design

Built from repeatable blocks

Every Green Power Station uses the same building block: grid-forming PCS units paired with liquid-cooled energy storage containers based on LFP battery technology, sized for around four hours of storage.

  • Scalable: from around 100 MW to several hundred MW by adding blocks.
  • Parallel delivery: blocks are installed, tested and commissioned in sequence.
  • Contained faults: a fault in one block is isolated without taking the station offline.
  • Proven equipment: Tier 1 technology at technology readiness level 9, with documented IEC, UL and NFPA compliance.

The same design is used at SATURN Hirtshals, SATURN Vejle and TITAN, which shortens engineering and procurement for every new site.

Photo to place here: Image 5

GRIN

GRIN: the missing link between renewable growth and grid stability

WeStorix has developed the Energy Hub concept under the name GRIN – Grid-Integrated Resilient Infrastructure Node. A GRIN is built around large-scale energy storage with grid-forming power conversion and acts as a continuously operating stabilization unit for the high-voltage grid.

At the same time, it is a secure connection point where renewable producers and industrial consumers are linked by direct line. Generation, storage and flexible consumption behind a shared connection point are assessed on their combined, controllable profile – not on the sum of their individual ratings.

Why it matters

  • System operators gain grid-forming services that can delay, reduce or avoid costly reinforcements.
  • Consolidating producers and consumers behind one connection point helps reduce the backlog of connection requests.
  • Industry gains capacity and predictable, locally produced renewable power.

GRIN has been submitted to the European Commission and is included in the European Grids Package, supported by five WeStorix white papers.

Need grid capacity, flexibility or firm green power? Let’s talk.

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